Diestock



Nov. 6, 1945.

G. ROPER DIE ySTOCK Filed March 13, 1944 Patented Nov. 6, 1945IlJNiTlaio' STATE s PATENT OFFICE assazem` Y DIESTOCK Y George Roper,Washington,` D. C. Application March '13, 1944, SerialkNo. 526,249

` r (c1. 1o-123) i y,

1 a die of large outside diameter? received in the 3' Claims.

This invention relates-to a die stock particularly adapted for threadingdies.

Its object is to provide a single die stock' which will iit dies ofdifferent outside diameter.

While dies of practically all `makes are standardized as to outsidediameter, there may be one size of outside diameter for dies of acertain range of threading capacity, and another size of outsidediameter for another range of capacity. Moreover, there are frequentlytwo outside diameters for dies of the same cutting capacity.

At the present time, when tools are scarce, it is v frequently difficultto obtain a replacement die having the same outside diameter as the onereplaced. This makes it necessary to provide an additional die stock tocarry the replacement die.

The'subject invention simpliliesthe situation by providing a single diestock adapted to t dies of different outside diameters.

,Other objects of the invention will appear as the following`description of a preferred and practical embodiment thereof proceeds.

In the drawing'which' accompanies and forms a part of the followingspecification, and throughout the several figures of which the samereference characters have been used to denote identical parts: i

Figure 1 is a plan View of a die stock embody- A ing the features of theinvention, th'e outer portions of the handles being omitted;

Figure 2 is a longitudinal vertical section taken along the line 2-2 ofFigure 1;

Figure 3 is a vertical diametrical section taken seated upon the lip 4and itself having a socket .i 6 with a peripheral underlying lip 1, andan adapter 8 fitting the socket of the adapter 5, seated upon the lip 1and itself being provided with a socket 9 having the peripheralunderlying lip I0. The sockets are all coaxial and the upper and lowerfaces of all of the underlying lips as well as the opposite faces I Iand I2 of the body I, lie in planes perpendicular to the common axis ofthe sockets.

With all of the adapters in place, as shown, the die stock will take adie I1 of small outside diameter, received in the socket 9. With theadapter 8 removed, it will take a die of intermediate outside diameterreceived in the socket 6 and with both adapters removed, it will takesocket 3. The Aselection of two adapters, as shown, rather than more orless than two, is purely arbitrary.

Substantially all dies are standardized to the extent that fora givenoutside diameter all'have the same thickness, also th'e thickness isproper; tional to th'e 'outside diameterso that dies of smaller outsidediameter are less thick than those of larger outsidediameter. Thesefactors are of important consideration in the design and construction ofthe subject die stock. The body I is provided at quadrantly spacedyintervals with radial threaded `bores I3 receiv ing the set screws I4.The axes of the set screws i are in a common plane perpendicular to theaxisr of rotation ofthe die stock and spaced from theV plane of theupper face of the lip 4 a distance equal to one half the thickness ofthe die which fits the socket 3. Since all dies are provided withexternal diametricallyopposite h'olding pits equi-f distant from theopposite faces of the die, for receiving the ends of the set screws, adie se-` cured in the socket 3 is reversible, for whichever side of thedie is against the lip 4, the pits will be coaxial with the set screws.I

'Ihe adapters are provided with' `quadrantly spaced bores I5 and I6,which may be unthreaded, and which are adapted to be brought intoalignment for the passage of set screws, and the 5f: axes of which boresare in the plane of the axes of the set screws when the adapters are inplace.

Since the die which fits the socket 6 is of less' thickness than the diewhich fits the socket 3, its o lower face will lie in a plane above theplane of Ti the upper face of the lip 4 when the die is supported withits holding pits coaxial with the set screws I4. Thedistance apart ofthese planes is the thickness of the lip l. `The rule is, therefore,th'at the thickness of the lip of each adapter Il is one half thedifferencebetween the thicknesses of dies whose outside diameters arerespectively the diameter of the socket of the adapter and the outsidediameter of the adapter.

The purpose of the lips is to provide a support for the inserted adapteror die so that it is automatically stopped in a position in which theaxes of the set screw bores in the adapters and/or the holding pits ofthe die are in the plane of the axes of the set screws, it being onlynecessary to orient the adapters and die to bring the bores and pitsinto circumferential registry with the set screws, whereupon the lattermay be tightened against the die in the customary manner. Usually, onlytwo opposite set screws enter Der face of the die flush with the upperface I' I2 of the body. Since the smaller dies will be of less thicknessthan the largest die, it is not necessary to make the adapters comeiiush with the upper face of the body I, as` shown. They It is.customary to present the lower face Il of the, die stock to the work.'However, the lower face oi the Vdie' is more d'eeply'in-setj` withrespect to the body l than the upper face, on account of the thicknessof the lip 4, in threading close to the head of a bolt, Afor example,Vthe upper Vface l2 ofthe body!! is presented to the work,` in whichcase, the die is reversed in the stock. Y

The upper and lower faces of the die stock are` preferably madeplani'form throughout, so thaty they serve as efcient eye gauges indetermining the` perpendicularity of the die stock with respect to the`bolt or rod being operated upon. v

l While I haveY in the above description disclosed what I believe toy bea preferred and.v practical embodiment of the invention, it will be.under'- stood to.V thoseskilled in the art that the specic detailsA ofconstruction and arrangement of parts,V

as. shown and described,l are by vway ci illustration and not to be.constructed as limiting the' scope of the. appended claims. c

vWhatA I` claim as my invention is:l

1. A die .stock comprising a bod-y having. a cylindrical socket and, aperipheraivlip at, one endoi said socket extending inwardly formln-g ashoulder, a cylindrical adapter received. within said socket havingitself a cylindrical socket. with said bores and the plane of theadapter shoulder is equal to half the thickness of a standard die havingan outside diameter equal to the diameter of the adapter socket.

2. A die stock comprising a body having a cylindrical socket and aperipheral lip at one end of said socket extending inwardly forming ashoulder, a plurality of nested adapters inserted in said socket theouter of said nested adapters being seated'upon the shoulder of saidsocket, each of said' nested adapters having a cylindrical socket and aperipheral lip at one end forming a shoulder at the lower end of itssocket, the smaller adapter` being seated upon the shoulder of theadapter within which it is received, said sockets being coaxial and saidshoulders lying k l inplanesy perpendicular to said axis, said body needcome no higher than the upper face of the dies which they enclose.

and said adapters having radial set screw bores with their axes in acommon plane perpendicular to the axis of. said sockets, said commonplane being spaced from the plane of they shoulder' of said bodysocket,- aV distance equal to half the thickness of a. standard diehaving an ,outside diameter equal tothe diameter of said body socket,Iand the thickness of the lips of the respective adapters being such thatthe distances between saidV common plane and the planes of therespective adapter shouders are equal to half the thickness ofvvstandarddies having outside diamaninwardly extending peripherallipatl one. end.y forming' a shoulder, said adapter being seatedon 50 the. irst,mentioned., shoulder,I said. sockets.Y being coaxial and sai-d shoulderslyingr planes perpendicular td said axis, said; body and adapter havingradial'set screw boreswith, their axes in` ay common plane perpendiculartothe axis of said sockets, the planey of the axes of saidl boresv being.spaced from the plane. of the shoulder of said body socket a distanceequal to half the thickness ot-a. standard die having an outsidediameter equal. tothe diameter of said. bodysocket, and the' thicknessof the adapter lipJ being such that the distance between the plane o`the axes koi etersvequal to the diameters oi the corresponding adaptersockets `3. A die stock for Athe selective .reception of dies, ofdierent size whose thickness varies in direct ratio to the diameter, andhaving a holding pit in their median diameterical plane, comprising, abody having a cylindrical socket with an inwardly extending peripheral:supporting lip at one end, the inner face' of which li-p llies in adiametrical: plane, the wall of said socket having a threadedY radialaperture therethrough, the axis of which is in a. diametricall planespaced from the plane of said lip a distance equalto half the thickness`of the die which i'lts said socket, an adapter fitting. in said socketsupported by said vlip provided with a cylindrical socket' and having aninwardly extending peripheral supporting lip at its innerendl, the innerfacey of which liesin aV diametricall plane, the wall of said adapterhaving a radiali apertureI registrable with said threaded aperture,having its axis in the diametrical plane of said threaded aperture, thethickness ofzsai'd adapter lip being such as vto space saiifi-lip froirrthe dii-ametrical plane of said axisI a distance equal to half thethickness of a die which tsqthesocket iin said adapter, and' ascrew'bolt threaded -intosai-d threaded aperture adapted to pass:through the aperture inY said adapterl wall and enter the holding pitin a die carried' by saidadapter.` j

` GEORGE' ROPER'.

